RDK-251 Power Integrations

Reference Design Report for a 5 W Dimmable Title Power Factor Corrected LED Driver (Non- TM Isolated) Using LinkSwitch -PL LNK457DG 90 VAC 265 VAC, >0.9 PF Input Specification 12 V 18 V, 350 mA 8% Output LED Driver for A19 Incandescent Lamp Application Replacement Author Applications Engineering Department Document RDR-251 Number Date February 15, 2011 Revision 1.92 Summary and Features Single stage power factor correction and accurate constant current (CC) output Low cost, low component count and small PCB footprint solution Superior performance and end user experience o >100:1 dimming range even with low cost leading edge TRIAC dimmers o Clean monotonic start-up no output blinking o Fast start-up (<300 ms) no perceptible delay o Consistent dimming performance unit to unit Highly energy efficient o >73% at 115 VAC / 230 VAC (dimmable configuration) o >78% at 115 VAC / 230 VAC (non-dimmable configuration) Integrated protection and reliability features o Output open-circuit protected / output short-circuit protected with auto-recovery o Auto-recovering thermal shutdown with large hysteresis protects both components and printed circuit board o No damage during brown out conditions o Extended pin creepage distance between device DRAIN pin and other pins for reliable operation in high pollution and humid environments Meets IEC ringwave and EN55015 conducted EMI PF >0.9 at 115 VAC / 230 VAC %ATHD <10% at 115 VAC and <15% at 230 VAC Meets EN61000-3-2 harmonics contents Power Integrations 5245 Hellyer Avenue, San Jose, CA 95138 USA. Tel: +1 408 414 9200 Fax: +1 408 414 9201 www.powerint.com RDR-251 5 W, PFC, Dimmable LED Power Supply 15-Feb-11 PATENT INFORMATION The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at <